Let's divide 71947706 by 644
The aim is to understand the frequency of 644 in 71947706.

Moving on to step 1:
644 can be fit into 7 0 times, resulting in a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 7, we get 7.
Include the next digit (1) from the dividend after 7, then repeat: 71 / 644

Moving on to step 2:
644 can be fit into 71 0 times, resulting in a remainder of 71.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 71 to get 71.
Bring next digit (9) of the dividend behind the 71 and repeat the process: 719 / 644

Moving on to step 3:
644 can be fit into 719 1 times, resulting in a remainder of 75.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtracting 644 from 719 leaves us with 75.
Bring next digit (4) of the dividend behind the 75 and repeat the process: 754 / 644

Moving on to step 4:
The number 644 fits into 754 1 times, leaving a remainder of 110.
The number 1 becomes the next digit in our result. 
Result so far: 11.0
If we take 644 away from 754, we end up with 110.
Bring next digit (7) of the dividend behind the 110 and repeat the process: 1107 / 644

Let's proceed to step 5:
If we divide 1107 by 644, we get 1 and a remainder of 463.
Put 1 as the next digit of the answer. 
Result so far: 111.0
Deduct 644 from 1107 and we're left with 463.
Include the next digit (7) from the dividend after 463, then repeat: 4637 / 644

Going ahead to step 6:
4637 divided by 644 is 7 with a remainder of 129.
The number 7 becomes the next digit in our result. 
Result so far: 1117.0
Subtracting 4508 from 4637 leaves us with 129.
Grab the next digit (0) from the dividend, add it to 129, then carry on: 1290 / 644

Let's proceed to step 7:
644 can be fit into 1290 2 times, resulting in a remainder of 2.
Use 2 as the next digit of our solution. 
Result so far: 11172.0
The remainder is 2 after subtracting 1288 from 1290.
Fetch the next digit (6) from the dividend, attach it to 2 and continue: 26 / 644

On to step 8:
644 can be fit into 26 0 times, resulting in a remainder of 26.
Use 0 as the next digit of our solution. 
Result so far: 111720.0
Subtract 0 from 26 to get 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

On to step 9:
The number 644 fits into 260 0 times, leaving a remainder of 260.
The number 0 becomes the next digit in our result. 
Result so far: 111720.0
Subtract 0 from 260 to get 260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2600, and continue the process.

Let's proceed to step 10:
644 can be fit into 2600 4 times, resulting in a remainder of 24.
Write down 4 as next digit of the result. 
Result so far: 111720.04
Subtracting 2576 from 2600 leaves us with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Moving on to step 11:
When dividing 240 by 644, we get 0 with a remainder of 240.
Write down 0 as next digit of the result. 
Result so far: 111720.04
If we take 0 away from 240, we end up with 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2400, and continue the process.

Let's proceed to step 12:
If we divide 2400 by 644, we get 3 and a remainder of 468.
The number 3 becomes the next digit in our result. 
Result so far: 111720.0403
Subtract 1932 from 2400 to get 468.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4680, and continue the process.

Advancing to step 13:
When dividing 4680 by 644, we get 7 with a remainder of 172.
Record the quotient 7 as the next digit in the result. 
Result so far: 111720.04037
Deduct 4508 from 4680 and we're left with 172.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1720, and continue the process.

Step 14:
The number 644 fits into 1720 2 times, leaving a remainder of 432.
The number 2 becomes the next digit in our result. 
Result so far: 111720.040372
If we subtract 1288 from 1720, we get 432.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4320, and continue the process.

Moving on to step 15:
4320 divided by 644 is 6 with a remainder of 456.
Write down 6 as next digit of the result. 
Result so far: 111720.0403726
The remainder is 456 after subtracting 3864 from 4320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4560, and continue the process.

On to step 16:
The number 644 fits into 4560 7 times, leaving a remainder of 52.
Use 7 as the next digit of our solution. 
Result so far: 111720.04037267
If we take 4508 away from 4560, we end up with 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

After the division, we end up with 111720.04037267 and a remainder of 5.2e-08.